/*
 * Copyright (C) 2009 M. Hautle.
 * 
 * This file is part of TrackedBean.
 * 
 * TrackedBean is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * TrackedBean is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with TrackedBean. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.trackedbean.copier.engine;

import ch.trackedbean.copier.*;

/**
 * {@link IMappingContext} doing nothing.
 * 
 * @author M. Hautle
 */
public class NOPMappingContext implements IMappingContext {
	/** The instance of this context. */
	public static final NOPMappingContext NOP = new NOPMappingContext();

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean copyDst2Src(IMappingHolder holder) {
		return true;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean copySrc2Dst(IMappingHolder holder) {
		return true;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public <T> T getElement(Object key, Class<T> type) {
		return null;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public <T> T putElement(Object key, T value) {
		return value;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public <T> T getValue(Object key) {
		return null;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public Object putValue(Object key, Object value) {
		throw new UnsupportedOperationException("NOP context does not support storing values!");
	}
}
